Žáruvzdorné materiály s nízkým a ultra nízkým obsahem cementu

Low and ultra-low Cement Castables have the characteristics of small pore size, large density, dobrá objemová stabilita, vysoká síla, and a small amount of water. They overcome the characteristics that the strength of ordinary castables decreases significantly at 800~1200 ℃, increases with the increase of temperature, and have excellent thermal shock resistance, slag resistance, and corrosion resistance.

Fyzikální a chemické ukazatele

Položka		Index
Položka		Jíl	Vysoký obsah oxidu hlinitého	korund
Al₂Ó₃ %		≥45	≥75	≥98
CaO %		＜1.8	＜1.5	＜1,0
Objemová hmotnost g/cm³	110℃×24h	≥2,3	≥2.6	≥3,1
	1350℃ × 3 h	≥2,26	≥2.61	/
	1550℃ × 3 h	/	/	≥3.00
Pevnost v tlaku za studena MPa	110℃×24h	≥70	≥75	≥85
	1350℃ × 3 h	≥85	≥90	/
	1550℃ × 3 h	/	/	≥100
Flexural Strength MPa	110℃×24h	≥6	≥8	≥9
	1350℃ × 3 h	≥8	≥9	/
	1550℃ × 3 h	/	/	≥11
Permanent linear change Rate %	1000℃ × 3 h	-0.3	-0.2	-0.2
	1350℃ × 3 h	±0,3	±0.5	/
	1550℃ × 3 h	/	/	±0.5
Maximum service temperature ℃		1450	1600	1800

Low and ultra-low cement castable features

Vysoká žáruvzdornost, vysoká teplota, a odolnost proti nízkým teplotám
Odolnost proti erozi, odolnost proti nárazu, vysoká odolnost proti opotřebení, vysoká síla
Silná plasticita, lze odlévat do libovolného tvaru
Dobrá vzduchotěsnost, může snížit tepelné ztráty a ušetřit energii

How to use castables？

Castables are generally poured and formed by on-site pouring, vibration, or tamping during use, and can also be made into prefabricated parts for use.

Low and ultra-low cement castables advantage

Low and ultra-low cement castables have strong cohesive force, long initial setting time and construction operation time, fast strength growth, strong impermeability, no need for acid treatment, easy to ensure the compactness of masonry ash gaps, and can significantly improve the blast furnace lining The airtightness of the wall, and the anti-corrosion ability of the lining.

Scope of application of castables

Low and ultra-low cement castables can be used in the steel industry, petrochemical industry, metallurgical industry, and power plant industry, with wide application and little restriction.